Pipeline welding equipment and welding method

The invention relates to the field of pipeline welding, in particular to pipeline welding equipment. Comprising a movable base, a pipe supporting oil cylinder arranged on the base, a bottom rod arranged on a power rod of the pipe supporting oil cylinder, two sets of bottom wheels arranged on the bottom rod and used for placing the ends of two sections of pipelines in a one-to-one correspondence mode, a pipe pressing oil cylinder arranged on the base, an ejector rod arranged on a power rod of the pipe pressing oil cylinder, and ejector wheels arranged on the ejector rod and abutting against the upper portions of the pipelines. The two opposite blocks are connected to the base in a sliding mode, the opposite block motor is arranged on the base and can drive the two opposite blocks to be close to or away from each other, the flat rotating blocks are connected to the opposite blocks in a rotating mode, and the two main half rings are arranged on the two flat rotating blocks in a one-to-one correspondence mode and